Bug 994185 - When dragging tiles on a 3x2 view, a third row of tiles shows up inexplicably [r=adw]
Also fixes Bug 988907 - Context menu and clicking-to-focus do not work in empty space above/below newtab grid
Cover up the sites that become position: absolute (and escape the flow for overflow: hidden) with an explicit background color for the bottom margin.
Merge m-c to fx-team.
Bug 988001 - Make the popup click to insert work again, r=bgrin
Bug 995027 logging - add traces to figure out whether uninit was called and where it got stuck, r=gfritzsche

--HG--
extra : rebase_source : 6c2e5dcce364bbce746a11b4e8841283656162c2
Bug 997188 - Handle the experiments.manifest.uri pref correctly so so that it don't ping out to telemetry-experiments.cdn.mozilla.net by default or enable experiment code in the tests. This should also fix bug 994686. r=irving/gfritzsche
Bug 998377 - Stop nulling out nsInProcessTabChildGlobal::mGlobal during DelayedDisconnect. r=smaug

This is already cycle-collected, so no extra work needs to happen.
Bug 998377 - Stop calling ReleaseWrapper in DelayedDisconnect(). r=smaug

AFAICT, nobody ever calls PreserveWrapper. Presumably, the CC machinery should
take care of us here.
Bug 998377 - Remove mDelayedDisconnect and friends. r=smaug
Bug 613659 - Implement box-decoration-break in the style system.  r=cam
Bug 613659 - Add "skip sides" and border/frame size parameters to GetBorderRadii().  Add an inline convenience method for the old signature.  r=cam
Bug 613659 - Implement box-decoration-break layout for border/box-shadow and paddding/margin for inlines.  r=cam
Bug 613659 - Implement box-decoration-break layout for backgrounds.  r=cam,jmuizelaar

--HG--
rename : layout/reftests/backgrounds/background-size-each-box.html => layout/reftests/backgrounds/background-size-clone.html
rename : layout/reftests/backgrounds/background-size-cover-each-box.html => layout/reftests/backgrounds/background-size-cover-clone.html
rename : layout/reftests/backgrounds/background-size-cover-continuous.html => layout/reftests/backgrounds/background-size-cover-slice.html
rename : layout/reftests/backgrounds/background-size-continuous.html => layout/reftests/backgrounds/background-size-slice.html
Bug 613659 - Remove remaining vestiges of -moz-background-inline-policy.  r=cam
Bug 613659 - Reftests for box-decoration-break.  r=cam
Bug 613659 - Change mode-lines and indentation to 2-space indent.  r=cam
Bug 613659 - Minor whitespace fixes.  r=cam
Bug 613659 - Make GetBorderRadii non-inline to make it compile on Windows.  r=dholbert
Bug 997700 - Fix build issues with LUL and --enable-warnings-as-errors.  r=nfroyd.
Bug 998155 - IonMonkey: Constify congruentTo and mightAlias. r=h4writer
Merge m-c to inbound.